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学者姓名：郑泽胤
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Abstract ：
Aiming at the problem that the existing single-phase-to-ground fault flexible compensation device has low compensation accuracy, long response time, and needs DC side power supply, a flexible compensation device based on double-loop passivity-based control is proposed. Firstly, the topology and working principle of the device are analyzed. And a compensation current distribution method of the bridge arm is proposed. Secondly, a double-loop passivity-based controller is designed. Finally, the proposed method is verified by MATLAB/Simulink software and 10 kV physical simulation system of distribution network. The comparisons between doubleloop passivity-based control, passivity-based control, and proportional integration control is discussed. The result shows that the proposed method can accurately and rapidly compensate the fault current.
Keyword ：
Distribution networks Distribution networks Double -loop passivity -based control Double -loop passivity -based control Flexible compensation Flexible compensation Single -phase -to -ground fault Single -phase -to -ground fault T -type topology T -type topology
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| GB/T 7714 | Guo, Mou-fa , Liu, Xin-bin , You, Jian-zhang et al. A flexible compensation device for single-phase-to-ground fault in distribution networks based on double-loop passivity-based control [J]. | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS , 2024 , 157 . |
| MLA | Guo, Mou-fa et al. "A flexible compensation device for single-phase-to-ground fault in distribution networks based on double-loop passivity-based control" . | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS 157 (2024) . |
| APA | Guo, Mou-fa , Liu, Xin-bin , You, Jian-zhang , Zheng, Ze-yin , Wang, Zhi-ying . A flexible compensation device for single-phase-to-ground fault in distribution networks based on double-loop passivity-based control . | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS , 2024 , 157 . |
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为解决传统三相直挂式柔性消弧装置非故障相桥臂承担线电压的问题,提出一种故障相桥臂转移接地的消弧方法.该方法通过开关控制故障相桥臂转移接地,母线电压由故障相桥臂与非故障相桥臂共同承担,三相桥臂共同输出电流,以实现消弧.针对级联H桥直流侧需独立供电的问题,提出分布式电压平衡换流调制方法.该调制方法根据H桥输出状态和电流方向对直流侧电容充放电的影响,有选择地改变H桥的输出状态,进而实现直流侧电压的稳定.使用该调制方法的消弧装置无须在直流侧配备独立供电电源,在消弧过程中能保持H桥直流侧电压稳定.最后,采用Matlab/Simulink仿真软件对所提方法进行验证,仿真结果证明了所提方法的有效性.
Keyword ：
单相接地故障 单相接地故障 消弧 消弧 直流侧电压 直流侧电压 级联H桥变流器 级联H桥变流器 转移接地 转移接地
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| GB/T 7714 | 郭谋发 , 刘鑫斌 , 张彬隆 et al. 故障相桥臂转移接地消弧装置直流侧电压控制方法 [J]. | 电力系统保护与控制 , 2024 , 52 (19) : 1-14 . |
| MLA | 郭谋发 et al. "故障相桥臂转移接地消弧装置直流侧电压控制方法" . | 电力系统保护与控制 52 . 19 (2024) : 1-14 . |
| APA | 郭谋发 , 刘鑫斌 , 张彬隆 , 赵国军 , 郑泽胤 . 故障相桥臂转移接地消弧装置直流侧电压控制方法 . | 电力系统保护与控制 , 2024 , 52 (19) , 1-14 . |
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Most of the phase-to-ground parameters induced between distribution lines and ground are asymmetric, which can result in the generation of unbalanced voltage, shifting the neutral point voltage. For compensated distribution networks, the existence of an arc suppression coil can increase the influence of asymmetric parameters and exacerbate the deviation of neutral point voltage. Maintaining the balance of three-phase voltage is a prerequisite not only for the stable operation of the distribution networks but also for improving the reliability of single-phase ground fault detection. This article proposes a novel online split-phase identification of asymmetric parameters between distribution lines and ground for unbalanced voltage compensation based on power electronics. First, an adaptive active current-type compensation method based on power electronics is proposed; it can adapt to compensate for three-phase unbalanced voltage with different neutral point grounding styles. Second, particle swarm optimization is used to realize the online split-phase identification of the phase-to-ground parameters of the distribution power lines. The identified parameters are used to calculate the reference value of the compensation current and the asymmetry of each phase-to-ground parameter. Finally, the feasibility and effectiveness of the proposed method are verified by simulation and experiment.
Keyword ：
Asymmetric parameters Asymmetric parameters distribution networks distribution networks online parameter split-phase identification online parameter split-phase identification particle swarm optimization (PSO) particle swarm optimization (PSO) power electronics power electronics unbalanced voltage compensation unbalanced voltage compensation
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| GB/T 7714 | Guo, Moufa , Jiao, Yaohui , Zheng, Zeyin et al. Online Split-Phase Identification of Asymmetric Parameters Between Distribution Lines and Ground for Unbalanced Voltage Compensation Based on Power Electronics [J]. | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2024 , 39 (8) : 10067-10078 . |
| MLA | Guo, Moufa et al. "Online Split-Phase Identification of Asymmetric Parameters Between Distribution Lines and Ground for Unbalanced Voltage Compensation Based on Power Electronics" . | IEEE TRANSACTIONS ON POWER ELECTRONICS 39 . 8 (2024) : 10067-10078 . |
| APA | Guo, Moufa , Jiao, Yaohui , Zheng, Zeyin , Zhang, Binlong , Lin, Jiahao , Hong, Qiteng . Online Split-Phase Identification of Asymmetric Parameters Between Distribution Lines and Ground for Unbalanced Voltage Compensation Based on Power Electronics . | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2024 , 39 (8) , 10067-10078 . |
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Two cascaded H-bridge converters (CHBC) are proposed to regulate the zero-sequence reactive current of distribution networks flexibly to realize the online ice-melting of ice-covered lines without power outages. The two CHBCs are connected in series to the grounding transformer at the head and end of the ice-covered lines. The zero-sequence voltage of the distribution networks is regulated by the end CHBC within the permissible range of insulation, and the resulting zero-sequence capacitive current to ground flows through the three-phase ice-covered conductors as ice-melting current, which realizes a better effect than the single-phase short-circuit current ice-melting. By regulating the capacitance current to the ground of the distribution networks through the head CHBC, the size of the ice-melting current can be adjusted arbitrarily. The proposed method does not require a single-phase grounding short circuit and can simultaneously accurately regulate the ice-melting current to melt ice in three-phase lines. CHBCs only have reactive interaction with the distribution networks, saving the capacity of DC sources, and the sum of power interactions is zero, which does not affect the normal supply voltage of the distribution networks, and there is no need for power outages for the entire network loads. The simulation and experimental results verify the feasibility and effectiveness of the proposed method and control scheme. © 2024 Power System Technology Press. All rights reserved.
Keyword ：
Bridge circuits Bridge circuits Capacitance Capacitance Electric grounding Electric grounding Electric loads Electric loads Ice Ice Outages Outages Power converters Power converters Reactive power Reactive power
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| GB/T 7714 | Zhang, Binlong , Zheng, Zeyin , Guo, Moufa . Online Ice-melting Method Based on Flexible Regulation of Zero-sequence Reactive Current for Ice-covered Lines in Distribution Networks Without Power Outages [J]. | Power System Technology , 2024 , 48 (2) : 913-922 . |
| MLA | Zhang, Binlong et al. "Online Ice-melting Method Based on Flexible Regulation of Zero-sequence Reactive Current for Ice-covered Lines in Distribution Networks Without Power Outages" . | Power System Technology 48 . 2 (2024) : 913-922 . |
| APA | Zhang, Binlong , Zheng, Zeyin , Guo, Moufa . Online Ice-melting Method Based on Flexible Regulation of Zero-sequence Reactive Current for Ice-covered Lines in Distribution Networks Without Power Outages . | Power System Technology , 2024 , 48 (2) , 913-922 . |
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There is a problem in that the non-fault phase bridge arm of traditional three-phase direct-hanging flexible arc suppression device bears the line voltage. Thus a fault phase bridge arm transfer grounding arc suppression method is proposed. This method controls the fault phase bridge arm transfer grounding through the switch. The bus voltage is shared by the fault phase bridge arm and the non-fault phase bridge arm, and the three-phase bridge arm outputs the current to achieve arc suppression. The cascaded H-bridge DC-link needs an independent power supply, so a distributed voltage balance commutation modulation method is proposed. The modulation method selectively changes the H-bridge output state according to the influence of H-bridge output state and current direction on the charge and discharge of the DC-link capacitor, and then realizes the stability of DC-link voltage. The arc suppression device using this modulation method does not need to be equipped with an independent power supply on the DC side, and can maintain H-bridge DC-link voltage stability during the arc suppression process. Finally, the proposed method is verified by Matlab/Simulink simulation software, and the results prove the effectiveness of the proposed method. © 2024 Power System Protection and Control Press. All rights reserved.
Keyword ：
Electric grounding Electric grounding Electric power system protection Electric power system protection HVDC power transmission HVDC power transmission MATLAB MATLAB Solar power generation Solar power generation
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| GB/T 7714 | Guo, Moufa , Liu, Xinbin , Zhang, Binlong et al. DC-link voltage control method of a fault phase bridge arm transfer grounding arc suppression device [J]. | Power System Protection and Control , 2024 , 52 (19) : 1-14 . |
| MLA | Guo, Moufa et al. "DC-link voltage control method of a fault phase bridge arm transfer grounding arc suppression device" . | Power System Protection and Control 52 . 19 (2024) : 1-14 . |
| APA | Guo, Moufa , Liu, Xinbin , Zhang, Binlong , Zhao, Guojun , Zheng, Zeyin . DC-link voltage control method of a fault phase bridge arm transfer grounding arc suppression device . | Power System Protection and Control , 2024 , 52 (19) , 1-14 . |
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本发明提出一种配电网单相接地故障柔性融合消弧方法，采用级联H桥变流器为柔性融合消弧装置，基于电流电压双闭环控制器，同时以故障点电流和故障点电压为控制目标。所提融合消弧方法无需复杂的切换条件，两种消弧方法同时在一套柔性消弧装置上实现，相较于消弧线圈与消弧柜配合使用的消弧方法，节省了设备的投入以及不同装置间的协同。不仅适用于中性点不接地系统，也适用于中性点经消弧线圈接地系统，且受消弧线圈暂态电流和线路阻抗压降影响小，兼具了柔性电流消弧法和柔性电压消弧法的优势。为柔性消弧技术在不同配电系统中的推广与应用提供了有力的技术保障。
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| GB/T 7714 | 郭谋发 , 游建章 , 高伟 et al. 配电网单相接地故障柔性融合消弧方法 : CN202111344747.5[P]. | 2021-11-12 00:00:00 . |
| MLA | 郭谋发 et al. "配电网单相接地故障柔性融合消弧方法" : CN202111344747.5. | 2021-11-12 00:00:00 . |
| APA | 郭谋发 , 游建章 , 高伟 , 洪翠 , 杨耿杰 , 郑泽胤 . 配电网单相接地故障柔性融合消弧方法 : CN202111344747.5. | 2021-11-12 00:00:00 . |
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本发明涉及一种互联配电网单相接地故障集成化消弧方法，提供一种零轴分量完全可控的柔性互联设备，控制柔性互联设备各个并网端口的零轴分量能够阻隔互联配电网之间的零序通路或实现单相接地故障消弧；控制柔性互联设备各个并网端口的dq轴分量实现功率交互；利用零轴分量与dq轴分量相互解耦的关系实现多功能协同控制。本发明在互联配电网正常运行时，阻隔互联配电网之间的零序通路，同时实现功率交互功能，对互联配电网进行调控；在互联配电网发生单相接地故障时，同时实现接地故障消弧与功率交互，抑制故障的同时为故障区段下游负荷进行功率全补偿，若一段时间后故障未消失，切除故障区段线路，仍能够保障故障区段下游负荷的供电可靠性。
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| GB/T 7714 | 郭谋发 , 张彬隆 , 郑泽胤 . 一种互联配电网单相接地故障集成化消弧方法 : CN202111571403.8[P]. | 2021-12-21 00:00:00 . |
| MLA | 郭谋发 et al. "一种互联配电网单相接地故障集成化消弧方法" : CN202111571403.8. | 2021-12-21 00:00:00 . |
| APA | 郭谋发 , 张彬隆 , 郑泽胤 . 一种互联配电网单相接地故障集成化消弧方法 : CN202111571403.8. | 2021-12-21 00:00:00 . |
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A current-voltage composite controller for an arc suppression inverter is designed.The current and voltage at the fault point are reduced by injecting current and regulating the neutral point voltage to completely eliminate the risk of fire and overvoltage caused by a single-line-to-ground fault arc.A cascaded inverter is used,and the effects of the ground parameter measurement,line impedance voltage drop,harmonic current and arc sup-pression coil on the current control,voltage control and composite control methods are analysed and compared.Finally,software simulations and industrial prototype experi-ments show that the proposed composite control method is effective and less affected by ground parameter measurement and line impedance voltage drop and has better adaptability.
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| GB/T 7714 | Jianzhang You , Moufa Guo , Zeyin Zheng et al. Flexible composite suppression method for ground arc in resonant grounding system [J]. | 高电压（英文） , 2023 , (6) : 1296-1305 . |
| MLA | Jianzhang You et al. "Flexible composite suppression method for ground arc in resonant grounding system" . | 高电压（英文） 6 (2023) : 1296-1305 . |
| APA | Jianzhang You , Moufa Guo , Zeyin Zheng , Xinbin Liu . Flexible composite suppression method for ground arc in resonant grounding system . | 高电压（英文） , 2023 , (6) , 1296-1305 . |
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In distribution networks, a single-line-to-ground fault frequently occurs, which poses a risk to the safe operation of power equipment and causes significant property damage. The conventional arc suppression coil serves as a passive compensating device, which is utilized to compensate for the capacitive component of the fault current. However, it lacks the ability to compensate for an active component of the fault current. To address this issue, this paper proposes a cascaded H-bridge inverter based on a backstepping control method with DC suppression. This method aims to fully compensate for the ground-fault current and restrict the faulty phase voltage. The proposed approach effectively mitigates the impact of system parameter perturbations, suppresses the DC component of the injected current, and reliably limits the fault current. Through simulation verification with different fault resistances, the results indicate the feasibility of the proposed method. ©2023 IEEE.
Keyword ：
Backstepping Backstepping Bridge circuits Bridge circuits Electric grounding Electric grounding Electric inverters Electric inverters Electric power distribution Electric power distribution
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| GB/T 7714 | Jiao, Yaohui , Zheng, Zeyin , Guo, Moufa et al. Design and Analysis of Backstepping Controller with DC Suppression Loop for Flexible Arc Suppression System in Distribution Networks [C] . 2023 : 255-258 . |
| MLA | Jiao, Yaohui et al. "Design and Analysis of Backstepping Controller with DC Suppression Loop for Flexible Arc Suppression System in Distribution Networks" . (2023) : 255-258 . |
| APA | Jiao, Yaohui , Zheng, Zeyin , Guo, Moufa , Hong, Cui . Design and Analysis of Backstepping Controller with DC Suppression Loop for Flexible Arc Suppression System in Distribution Networks . (2023) : 255-258 . |
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Three-phase AC distribution networks are required to operate as symmetrically as possible for optimal performance, but the three-phase-to-ground parameters are asymmetric in the field due to network construction deviation, resulting in the three-phase voltage unbalance and the neutral point displacement overvoltage. The neutral point displacement overvoltage would endanger the distribution networks and even damage critical power equipment. Therefore, the flexible asymmetry suppression device (FASD) with the topology of a cascaded H-bridge (CHB) inverter and the backstepping control (BSC) method is proposed for limiting the neutral point displacement overvoltage in this paper. The FASD outputs the current to the grid for compensating the unbalanced distribution networks caused by the asymmetry of three-phase-to-ground parameters and realizing the suppression of the neutral point displacement overvoltage. A current-based BSC method is designed to improve the stability and reliability of the CHB inverter, and the effectiveness of neutral point displacement overvoltage suppression based on the BSC method is verified by experimental results, and the advantage of the proposed method is shown by comparing with proportional-integral control (PIC) method, sliding mode control (SMC), and proportional resonant control (PRC) methods.
Keyword ：
Backstepping control Backstepping control Current injection Current injection Distribution networks Distribution networks Neutral point displacement overvoltage Neutral point displacement overvoltage suppression suppression Three -phase -to -ground parameters asymmetry Three -phase -to -ground parameters asymmetry
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| GB/T 7714 | Zheng, Ze-Yin , Xu, Jian-Feng , Zhang, Bin -Long et al. Flexible neutral point displacement overvoltage suppression method based on backstepping control in unbalanced distribution networks [J]. | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS , 2023 , 148 . |
| MLA | Zheng, Ze-Yin et al. "Flexible neutral point displacement overvoltage suppression method based on backstepping control in unbalanced distribution networks" . | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS 148 (2023) . |
| APA | Zheng, Ze-Yin , Xu, Jian-Feng , Zhang, Bin -Long , Wang, Hui , Guo, Mou-Fa , Lin, Shuyue . Flexible neutral point displacement overvoltage suppression method based on backstepping control in unbalanced distribution networks . | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS , 2023 , 148 . |
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